A novel online programming compatible circuit for motor-embedded variable frequency drive board

Abstract

This invention provides a novel online programming compatibility circuit for a motor's built-in frequency converter drive board. An online programming compatibility circuit is added to the original circuit. Under normal use, the host computer transmits data to the motor's frequency converter drive board via the CN1 terminal, transmitting signals such as +310V, GND, +15V, VSP, and PG, ensuring the normal operation of the frequency converter drive board. When online software programming is required, the +3.3V, GND, TX, and RX signals of the programming port are connected to pins 3, 4, 2, and 1 of CN1, respectively. The programmer directly connects to the CN1 terminal and performs programming. The circuit automatically adapts to the input signals without requiring other control, enabling software programming without disassembling the motor casing.

Description

Technical Field

[0001] This utility model relates to the field of motor software design technology with built-in variable frequency drive board, and in particular to a novel online programming compatible circuit for a motor with built-in variable frequency drive board. Background Technology

[0002] Currently, the built-in frequency converter drive board is first programmed with software, then installed inside the motor, and the back cover is fixed with screws. It is then connected to the host computer via a wiring harness.

[0003] After the inverter drive board is installed, if any program problems occur or the customer needs to optimize the motor program, the motor back cover must be disassembled first, the inverter drive board program must be re-burned, and then the motor back cover must be installed. In this process, professional equipment is required to disassemble and install the motor. Moreover, the motor bearings are easily damaged during disassembly and assembly, which can greatly reduce the overall lifespan and noise of the motor.

[0004] This invention redesigns the input and output circuits of the frequency converter drive board for compatibility, enabling software reprogramming without disassembling the motor, thus significantly reducing the overall programming cost and damage to the motor's mechanical components. Utility Model Content

[0005] To achieve the above objectives, this utility model provides a novel online programming compatibility circuit for a motor-embedded frequency converter drive board. By redesigning the input and output circuits of the frequency converter drive board for compatibility, the software can be reprogrammed without disassembling the motor, even if software modifications are required. This greatly reduces the overall programming cost and the damage to the motor's mechanical components.

[0006] This utility model provides a novel online programming compatible circuit for a motor built-in frequency converter drive board, including an NMOS transistor Q7, three NPN transistors Q2, Q5 and Q6, three PNP transistors Q1, Q3 and Q4, two switching diodes D1 and D2, a Zener diode D3, 15 resistors R1 to R15 and two capacitors C1 and C2;

[0007] Two branches are led out from pin 1 of CN1 terminal of the frequency converter drive board. One branch is connected to the emitter of Q3, and the other branch is connected to one end of R10 and C2. The other end of R10 is connected to the negative terminal of D3 and the collector of Q5. The base of Q5 is connected to one end of R12 and R13. The other end of R12 is connected to the signal feedback terminal PG_OUT of the frequency converter drive board. The other end of C2, the positive terminal of D3, the emitter of Q5 and the other end of R13 are grounded.

[0008] Two branches are led out from pin 2 of CN1 terminal of the frequency converter driver board. One branch connects one end of R1 to the collector of Q2, the other end of R1 to the collector of Q1, the emitter of Q1 to the programming port TX of the frequency converter driver board, the base of Q1 to one end of R2, the other end of R2 to one end of R5 and the positive terminal of D2, the other end of R5 to the base of Q3, the collector of Q3 to one end of R3 and the programming port RX of the frequency converter driver board, and the other end of R3 to ground. The other branch connects one end of R4 and grounds it. The other end of R4 is connected to the positive terminal of D1, one end of R6, one end of C1 and the signal input terminal VSP_IN of the frequency converter driver board. The negative terminal of D1 is connected to +3.3V voltage, and the other ends of R6 and C1 are grounded.

[0009] Pin 3 of CN1 on the frequency converter drive board is connected to one end of R7, one end of R8, and the emitter of Q4. The other end of R7 is connected to the gate of Q7 and one end of R14. The other end of R8 is connected to the drain of Q7, the base of Q2, the base of Q6, and one end of R15. The base of Q4 is connected to one end of R9. The other end of R9 is connected to the collector of Q6 and the negative terminal of D2. The collector of Q4 is connected to +3.3V voltage and one end of R11. The emitter of Q2, the other end of R14, the source of Q7, the other end of R15, the emitter of Q6, and the other end of R11 are grounded.

[0010] Pin 4 of the CN1 terminal on the frequency converter drive board is grounded, pin 5 is left floating, and pin 6 is connected to +310V voltage.

[0011] This invention adds an online programming compatibility circuit to the original circuit. Under normal use, the host computer transmits signals such as +310V, GND, +15V, VSP, and PG to the motor's frequency converter drive board through the CN1 terminal, enabling the frequency converter drive board to work normally. When online software programming is required, the +3.3V, GND, TX, and RX of the programming port are connected to pins 3, 4, 2, and 1 of CN1, respectively. The programmer directly connects to the CN1 terminal and performs programming. The circuit is automatically compatible with the input signals and requires no other control, enabling software programming without disassembling the motor housing. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1This is a schematic diagram of an online programming compatible circuit structure for a novel motor-embedded frequency converter drive board provided in an embodiment of this disclosure. Detailed Implementation

[0014] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0015] Figure 1 This disclosure provides a novel online programming compatibility circuit for a motor-embedded frequency converter drive board, such as... Figure 1 As shown, it includes an NMOS transistor Q7, three NPN transistors Q2, Q5 and Q6, three PNP transistors Q1, Q3 and Q4, two switching diodes D1 and D2, a Zener diode D3, 15 resistors R1 to R15 and two capacitors C1 and C2.

[0016] Two branches are led out from pin 1 of CN1 terminal of the frequency converter drive board. One branch is connected to the emitter of Q3, and the other branch is connected to one end of R10 and C2. The other end of R10 is connected to the negative terminal of D3 and the collector of Q5. The base of Q5 is connected to one end of R12 and R13. The other end of R12 is connected to the signal feedback terminal PG_OUT of the frequency converter drive board. The other end of C2, the positive terminal of D3, the emitter of Q5 and the other end of R13 are grounded.

[0017] Two branches are led out from pin 2 of CN1 terminal of the frequency converter driver board. One branch connects one end of R1 to the collector of Q2, the other end of R1 to the collector of Q1, the emitter of Q1 to the programming port TX of the frequency converter driver board, the base of Q1 to one end of R2, the other end of R2 to one end of R5 and the positive terminal of D2, the other end of R5 to the base of Q3, the collector of Q3 to one end of R3 and the programming port RX of the frequency converter driver board, and the other end of R3 to ground. The other branch connects one end of R4 and grounds it. The other end of R4 is connected to the positive terminal of D1, one end of R6, one end of C1 and the signal input terminal VSP_IN of the frequency converter driver board. The negative terminal of D1 is connected to +3.3V voltage, and the other ends of R6 and C1 are grounded.

[0018] Pin 3 of CN1 on the frequency converter drive board is connected to one end of R7, one end of R8, and the emitter of Q4. The other end of R7 is connected to the gate of Q7 and one end of R14. The other end of R8 is connected to the drain of Q7, the base of Q2, the base of Q6, and one end of R15. The base of Q4 is connected to one end of R9. The other end of R9 is connected to the collector of Q6 and the negative terminal of D2. The collector of Q4 is connected to +3.3V voltage and one end of R11. The emitter of Q2, the other end of R14, the source of Q7, the other end of R15, the emitter of Q6, and the other end of R11 are grounded.

[0019] Pin 4 of the CN1 terminal on the frequency converter drive board is grounded, pin 5 is left floating, and pin 6 is connected to +310V voltage.

[0020] The detailed workflow of this utility model is as follows:

[0021] When the frequency converter drive board is working normally:

[0022] 1) When pin 3 (+15V / 3.3V) of CN1 is normally connected to 15V, Q7 conducts, Q6 does not conduct, Q4 does not conduct, 15V and +3.3V do not conduct, and VSP is normally input to the frequency converter drive board;

[0023] 2) When the voltage at pin 2 (VSP / RX) of CN1 is normally connected to 0-10V, Q7 is turned on, Q2 and Q6 are not turned on, Q1 is not turned on, VSP and TX are not turned on, and VSP is normally input to the frequency converter drive board.

[0024] 3) Pin 1 (PG / TX) of CN1 terminal is normally connected → Q7 is on → Q6 is not on → Q3 is not on → PG and RX are not on → PG normally receives the feedback signal from the frequency converter drive board.

[0025] 4) Pin 4 of CN1 terminal is normally connected to GND.

[0026] When the frequency converter driver board needs to be programmed online:

[0027] 1) When pin 3 (+15V / 3.3V) of CN1 is normally connected to 3.3V, Q7 is not conducting, Q6 conducts, Q4 conducts, 15V and +3.3V are conducting, and the 3.3V power supply voltage is input to the frequency converter drive board through pin 3 of CN1;

[0028] 2) When pin 2 (VSP / RX) of CN1 is normally connected to the programmer RX, Q7 is not conducting, Q6 is conducting, Q1 and Q2 are conducting, pin 2 of CN1 is connected to the TX pin of the frequency converter driver board, and the programmer RX and the frequency converter driver board TX communicate normally.

[0029] 3) When pin 1 (PG / TX) of CN1 is normally connected to the programmer TX, Q7 is not conducting, Q6 is conducting, Q4 is conducting, pin 1 of CN1 is connected to the RX pin of the frequency converter driver board, and the programmer TX and the frequency converter driver board RX communicate normally.

[0030] 4) Pin 4 of CN1 terminal is normally connected to GND.

[0031] The present invention has thus far described the technical solution of the present invention with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims

1. An online burning compatible circuit of a novel built-in variable frequency drive board of an electric machine, characterized in that, It includes an NMOS transistor Q7, three NPN transistors Q2, Q5 and Q6, three PNP transistors Q1, Q3 and Q4, two switching diodes D1 and D2, a Zener diode D3, 15 resistors R1 to R15, and two capacitors C1 and C2. Two branches are led out from pin 1 of CN1 terminal of the frequency converter drive board. One branch is connected to the emitter of Q3, and the other branch is connected to one end of R10 and C2. The other end of R10 is connected to the negative terminal of D3 and the collector of Q5. The base of Q5 is connected to one end of R12 and R13. The other end of R12 is connected to the signal feedback terminal PG_OUT of the frequency converter drive board. The other end of C2, the positive terminal of D3, the emitter of Q5 and the other end of R13 are grounded. Two branches are led out from pin 2 of CN1 terminal of the frequency converter driver board. One branch connects one end of R1 to the collector of Q2, the other end of R1 to the collector of Q1, the emitter of Q1 to the programming port TX of the frequency converter driver board, the base of Q1 to one end of R2, the other end of R2 to one end of R5 and the positive terminal of D2, the other end of R5 to the base of Q3, the collector of Q3 to one end of R3 and the programming port RX of the frequency converter driver board, and the other end of R3 to ground. The other branch connects one end of R4 and grounds it. The other end of R4 is connected to the positive terminal of D1, one end of R6, one end of C1 and the signal input terminal VSP_IN of the frequency converter driver board. The negative terminal of D1 is connected to +3.3V voltage, and the other ends of R6 and C1 are grounded. Pin 3 of CN1 on the frequency converter drive board is connected to one end of R7, one end of R8, and the emitter of Q4. The other end of R7 is connected to the gate of Q7 and one end of R14. The other end of R8 is connected to the drain of Q7, the base of Q2, the base of Q6, and one end of R15. The base of Q4 is connected to one end of R9. The other end of R9 is connected to the collector of Q6 and the negative terminal of D2. The collector of Q4 is connected to +3.3V voltage and one end of R11. The emitter of Q2, the other end of R14, the source of Q7, the other end of R15, the emitter of Q6, and the other end of R11 are grounded. Pin 4 of the CN1 terminal on the frequency converter drive board is grounded, pin 5 is left floating, and pin 6 is connected to +310V voltage.

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